revert using extensions in any module

It fixes the issue that Maven try to resolve the plugin before the reactor build even starts.
Maven needs to load extensions during the project model building phase, which happens before any module is compiled.

Author: manolo

vaadin-platform-test/pom-dev.xml

@@ -106,11 +106,6 @@
                     <skipNexusStagingDeployMojo>true</skipNexusStagingDeployMojo>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>com.vaadin</groupId>
-                <artifactId>vaadin-maven-plugin</artifactId>
-                <extensions>true</extensions>
-            </plugin>
         </plugins>
     </build>
 
@@ -200,6 +195,17 @@
                           </execution>
                         </executions>
                     </plugin>
+                    <plugin>
+                        <groupId>com.vaadin</groupId>
+                        <artifactId>vaadin-maven-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <goals>
+                                    <goal>prepare-frontend</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
                 </plugins>
             </build>
         </profile>

vaadin-platform-test/pom.xml

@@ -164,7 +164,13 @@
             <plugin>
                 <groupId>com.vaadin</groupId>
                 <artifactId>vaadin-maven-plugin</artifactId>
-                <extensions>true</extensions>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>prepare-frontend</goal>
+                        </goals>
+                    </execution>
+                </executions>
             </plugin>
         </plugins>
     </build>
@@ -247,6 +253,17 @@
                             </execution>
                         </executions>
                     </plugin>
+                    <plugin>
+                        <groupId>com.vaadin</groupId>
+                        <artifactId>vaadin-maven-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <goals>
+                                    <goal>prepare-frontend</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
                     <plugin>
                         <artifactId>maven-antrun-plugin</artifactId>
                         <version>3.0.0</version>
@@ -266,5 +283,29 @@
             </build>
         </profile>
 
+        <profile>
+            <!-- Production mode is activated using -Pproduction -->
+            <id>production</id>
+            <activation>
+                <property>
+                    <name>vaadin.productionMode</name>
+                </property>
+            </activation>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>com.vaadin</groupId>
+                        <artifactId>vaadin-maven-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <goals>
+                                    <goal>build-frontend</goal>
+                                </goals>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
     </profiles>
 </project>